Ignition devices for gas burners x



Miami 24, 1959 B. L. MATT EWS m1, 2,878,862

IGNITION DEVICES FOR GAS BURNERS.

Filed April 30, 1956 INVENTOR. Bmcmna L; MA rn/e'ws Iowan: .1ZAHYJA/ICKY A! rro PM: vs

IGNITION DEVICES FOR GAS BURNERS Birchard L. Matthews and Edward J.Zarybnicky, Cleveland, Ohio, assignors to The W. J. SchoenbergerCompany, Cleveland, Ohio Application April 30, 1956, Serial No. 581,6074 Claims. (Cl. 158-115) stop means being provided to limit the swingingmovement of the shield when the gas burner is removed from the gasappliance.

Moreover, the invention provides means for aligningv and supporting thefree end of the shield when reassembling the gas burner.

. The above objects and advantages have been accomplished by the deviceshown in the accompanying drawings, of which:

. Fig. 1 is a side elevation, partly in section, of a gas burnerequipped with the invention;

Fig. 2 is an enlarged fragmentary plan view of the form of invention ofFig. 1;

Fig. 3 is an exploded isometrical perspective view of the pilot fittingand shield;

' Fig. 4 is a reduced sectional view taken on line IV--IV of Fig. 2;

Fig. 5 is a. fragmentary plan view of a modified form of the invention;a g

, Fig. 6 is an exploded view of the form of device shown in Fig. 5; and

Fig. 7 is an exploded view of another modification of "the inven'tion.-

i Referring now to the forms of device shown in Figs; 1 to 4, inclusive,10 represents a gas burner which is carried by a mixing tube 11 andsupplied with gas through a valve 12. The valve 12 is provided with theusual actuating handle 13 and is supplied with gas from a gas supplypipe 14.

The ignition port fitting 15 which is permanently attached to the gasburner head is provided with a fluted stem portion 16 for insertion in asuitable aperture 20 formed in said head and preferably at the rearthereof whereby the fitting will be supplied with gas mixture when thegas burner is turned on.

This fitting is formed with coaxial passages 21 and 23 and with alateral passage 22 formed in the head 24 of the fitting and incommunication with the lateral passage thereof. A slot 25 is formed inthe fitting head which opens into the passages 22 and 23, whereby, whenthe fitting is supplied with gas from the main burner, a stream of gasmixture will be projected rearwardly from the passage 23 and upwardlyfrom the passage 22 and slot 25 in a manner to be hereinafter described.

Arranged in rear of and in spaced relation with the fitting is a pilottube 26 which is connected at its closed end to a T-fitting 30. The

T-fitting is secured to a suitable support 31 carried by the stovestructure (not shown) and it is fed with gas through a pilot supply pipe32 which is connected to the gas supply pipe 14 through a filter 33. Anadjusting screw 34 is carried by the filter for regulating the amount ofgas supplied to the T-fitting 30. The pilot tube 35, shown infragmentary manner in i Fig. 1, is carried by the T-fitting and is forsupplying the pilot burner of an additional gas burner (not shown). Eachof the pilot tubes is provided on its free end with a small nozzle 36having a relatively small passage for supplying gas to a permanentlyignited small ignition flame 40 shown in Fig. 1. The pilot tube ispreferably so located that its axis is below the axis of the passage 23.

So as to protect the flame of the pilot nozzle from being extinguished,a shield 41 is placed about the end of the tube and nozzle. The forwardend of this shield may be formed with two oppositely spaced arms 42which are removably attached to the head 24 of the fitting by means ofinwardly extending teats 43 which engage dimples or indentations 44formed one at each side of the head. As clearly shown in Fig. 2, spaceisprovided between the arms andv the side faces of the head so that theteats will have definite engagement with the dimples, whereby the shieldwill be pivotally attached to the fitting. The endsurfac es 45 of thearms are spaced slightly from the flange 46 of the fitting, as clearlyshown in Figs. 1 and 2, whereby as the shield is pivoted about theengaged teats" and dimples, 'the lower portions of the abutment surfaces45 will engage the flange 46 of the fitting when the burner is removedfrom the stove, and limit the downward movement of the outer end of theshield, as clearly shown in dotted lines in Fig. 4. Consequently, whenthe burner 10 is removed from the gas valve, the shield will be removedwith it and will be maintained in such position that when reassemblingthe gas burner, the shield will readily engage the pilot tube 26 andsupport the rear end thereof. In order that the back end of the shieldwill readily register with the pilot tube, it is provided with inwardlybent tabs 50 which form an inverted V-shaped opening 51 for engagementwith the tube.

Referring now to the form of invention shown in Figs. 5

and 6, the shield 52 is supported by a fixed yoke 53. The yoke hasrearwardly extending tabs 54 in each of which fitting is passed beforeinsertion in the opening 20 of the burner.v This yoke isdisposed behindthe flange 46 of. the-fitting 15 .whenithis fitting is assembled. Thes'hieldin this form of invention is provided with forwardly extendingarms 56 each being formed in its outer end with an outwardly projectingbutton 60 which engages the aperture 55 in each of the arms 54 of theyoke. The ends 57 of the arms 56 and the position of the apertures 55 inthe yoke are so proportioned that the shield will have a limited amountof swinging movement when the burner carrying it is removed from the gasappliance.

In the form of invention shown in Fig. 7, the yoke 61 is attached to theburner in a manner similar to the form of invention shown in Figs. 5 and6. This yoke is formed with a central opening 68 and with two rearwardlyextending arms 62 in each of which is formed a vertical slot 63. Theshield 64 of this form is provided with forwardly extending arms 65 onthe upper end of each of which is formed an outwardly extending tab 66which, when assembled with the yoke, engages each of the slots 63 of theyoke. The end 67 of these arms will bear against the yoke when the gasburner is removed from the appliance thereby limiting the downwardmovement of the shield.

From the foregoing, it will be obvious that the pilot Patented Mar. 24,1959 I flame 40 will be constantlybuming and that when the gas valve 12is turned on and a gas mixture is supplied to the burner 10, gas willflow through the ignition port fitting and out of the axial passages 21and 23, lateral passage 22 and'slot 25. The gas projected through theaxial passages will be ignited by the pilot flame 40 which in turn willignite the gas flowing upwardly through the passage 22 thereby ignitingthe gas issuing from the gas burner.

It will also be clear from the foregoing that when the burner with itsmixing tube is removed from the gas appliance for cleaning, the shieldof either form of invention will be lifted from the supporting pilottube and be removed from the stove with the burner. If desired forcleaning purposes, the shield may be removed from the pilot fitting orfrom either of the yokes at will. When the burner is to be replacedwithin the gas appliance, the shield having been attached to the burner,it will be readily aligned and be supported by the pilot tube as theburner is brought to its final position.

While we have shown a number of forms of our invention, it is obviousthat other forms may be employed, and we do not wish to be limited tothe exact embodiment herein shown and described.

What is claimed is:

l. The combination with a gas burner, of an ignition device, comprisingignition port means carried by said burner, said port means being formedwith an upwardly extending lateral passage and with a rearwardlyextending axial passage in communication with said lateral passage andwith the mixing chamber of said burner, a pilot burner having ahorizontally arranged pilot tube disposed adjacent said port means,means for supporting said tube, a nozzle carried at the outer end ofsaid tube and in communication therewith, said nozzle being positionedso as to project its flame toward said port means, means for supplyinggas to said tube, a pilot burner shield disposed about the outer end ofsaid pilot tube and saw ing at one end outwardly extending arms forpivotal engagement with said port means, and the other end of saidshield being freely supported by said pilot tube.

2. The combination with a gas burner, of an ignition device comprisingignition port means carried by said burner, said port means being formedwith an upwardly extending lateral passage and with a rearwardlyextending axial passage in communication with said lateral passage andwith the mixing chamber of said burner, a pilot burner having ahorizontally arranged pilot tube disposed adjacent said port means,means for supporting said tube, a nozzle carried at the outer end ofsaid tube and in communicatiton therewith, said nozzle being positionedadjacent to said port means, means for supplying gas to said tube, apilot burner shield having outwardly extending arms, means for pivotallyattaching said arms to said port means, and each of said arms beingformed on its end surface with abutment faces spaced from and engageablewith said port means for limited rotation of said shield about itspivots.

3. The combination with a gas burner, of an ignition device, comprisingignition port means carried by said burner, said port means being formedwith an upwardly extending lateral passage and with a rearwardlyextending axial passage in communication with said lateral passage andwith the mixing chamber of said burner, a pilot' burner having ahorizontally arranged pilot tube disposed adjacent said port means,means for supporting said tube a nozzle carried at the outer end of saidtube and in communication therewith, said nozzle being positioned so asto project its flame toward said port means, means for supplying gas tosaid tube, a pilot burner shield disposed about the outer end of saidpilot tube and fully supported by said port means and said pilot tube,said shield having a closed upper body portion and oppositely arrangedspaced arms each formed with an inwardly extending teat, and said portmeans being formed with a dimple in each of its opposite sides forpivotal engagement with the teats of said arms.

4. The combination with a gas burner, of an ignition device, comprisingignition port means carried by said burner, said port means being formedwith an upwardly extending lateral passage and with a rearwardlyextending axial passage in communication with said lateral passage andwith the mixing chamber of said burner, a pilot burner having ahorizontally arranged pilot tube disposed adjacent said port means,means for supporting said tube a nozzle carried at the outer end of saidtube and in communication therewith, said nozzle being positioned so asto project its flame toward said port means, means for supplying gas tosaid tube, a pilot burner shield disposed about the outer end of saidpilot tube and supported by said port means and said pilot tube, saidshield having a closed upper body portion and oppositely arranged spacedarms each formed with an inwardly extending teat, said port means beingformed with a dimple in each of its opposite sides for pivotalengagement With the teats of said arms, and each of said arms beingformed on its end surface with abutment faces spaced from and engageablewith said port means for limited rotation of said shield about itspivots.

References Cited in the file of this patent UNITED STATES PATENTS

